دراسة عملية لبيان تأثير تغير بعض أجزاء منظومة التبريد على معامل الأداء

Abstract

In this paper an experimental study was carried out on the effects of manipulating some parts of the air conditioning unit on its coefficient of performance. It covers, effects of an auxiliary condenser, variable fan's speed, changing the coolant of the condenser from air to water with variable volume flow rate, in addition of adopting capillary tube of multiple length.The results show that the C.O.P was increased between 21.6% - 32.2% when the auxiliary condenser was used. But its value only increased by 11.3% - 22.6% when the cooling fluid is changed from air to water. However when two air cooled condensers were used the increasing in C.O.P. was between 6.4% - 16.6% with respect to water cooling condenserIt was also found that the length of capillary tube has two opposite tendencies on the C.O.P. of the air conditioning unit . In one of them the value of C.O.P was decreased by 3.8%-8% when the capillary tube's length changed from 1.92 m to 2.4 m, and it was increased by 2.6% - 6.7% when the tube's length decreased from 1.92m to 1.4m